fix(tts): reduce the pause duration between sentences in Edge TTS, closes #2837 (#2844)

apps/readest-app/src/services/tts/EdgeTTSClient.ts

@@ -56,7 +56,7 @@ export class EdgeTTSClient implements TTSClient {
   }
 
   getPayload = (lang: string, text: string, voiceId: string) => {
-    return { lang, text, voice: voiceId, rate: this.#rate, pitch: this.#pitch } as EdgeTTSPayload;
+    return { lang, text, voice: voiceId, rate: 1.0, pitch: this.#pitch } as EdgeTTSPayload;
   };
 
   getVoiceIdFromLang = async (lang: string) => {
@@ -169,6 +169,7 @@ export class EdgeTTSClient implements TTSClient {
           };
           this.#isPlaying = true;
           audio.src = audioUrl || '';
+          audio.playbackRate = this.#rate;
           audio.play().catch((err) => {
             cleanUp();
             console.error('Failed to play audio:', err);

apps/readest-app/src/services/tts/TTSController.ts

@@ -124,7 +124,7 @@ export class TTSController extends EventTarget {
     for await (const _ of iter);
   }
 
-  async preloadNextSSML(count: number = 2) {
+  async preloadNextSSML(count: number = 4) {
     const tts = this.view.tts;
     if (!tts) return;
     let preloaded = 0;